Устранение фазовых ошибок на элементах антенной решетки коротковолнового диапазона за счет компенсации набега фаз в фидере

On the feed line of the HF radar is influenced by various interference factors. One of these factors may be temperature change. Under the influence of a randomly changing temperature the length of the feeder lines changes, and hence the conditions of propagation of electromagnetic waves can be changed. Unreported changes in the conditions of propagation of electromagnetic waves leads to the appearance of spurious phase shifts (phase errors) and as a result the distortion of the amplitude-phase distribution on the aperture antenna. It is known that the change of amplitude-phase distribution inevitably changes the shape of the directivity pattern of the antenna, which is often undesirable. The aim of this work is to examine the effect of temperature on the magnitude of phase errors and the development of structural-functional scheme of the device for automatic compensation of changes of phase shifts caused by the feeder system, in real time. In the article the analysis of the effect of temperature on the magnitude of phase errors is made, and also the implementation of the method of compensation of these phase errors is examine. So, to eliminate distortion of the phase distribution at the aperture of the antenna array the method of the automatic compensation of phase shifts in the feeders is proposed. It is based on the introduction of a feedback channel from the input emitter to the output of the active module and the implementation of the principles of closed-loop systems. This feedback is the same feeder, in which vibrations are input to the transmitter. Such system becomes adaptive to the difference of the lengths of the feeders and change of their parameters under the influence of uncontrollable external factors.